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State of the Heat Pumps May 2018:
From: Matt Nicholson [mailto:mattn@medfordwellington.com]
Sent: Friday, May 25, 2018 9:48 AM
To: randell@draneengineering.com
Subject: Re: Yesterday in the coho mech room
Hi Randell,
Please see information below
As we discussed our intention was to check everything and see what was working, what was not and what was in between. I don't think anything more than what you saw was determined or corrected. Out of the 16 stages you are down 6 at this point so the equivalent of 3 total heat pumps.
Heat pump 5 needs a compressor replacement. We can quote that if you want. Given conditions it would be quoted for two guys to do the work at 8 hours each. With that we can also include the leak check on circuit 2 of HP 8. As far as HPs 2 and 7, they should be replaced. There is too many issues with each of those for us to undertake any repairs. We would consider them in need of a complete rebuild.
Everything that is operational seems to be working as well as expected. There are minor charge issues but nothing standing out as in need of immediate attention. We were able to run the loop with all the operational units on and achieve set point. The question will obviously be how it reacts after a few days of excessive heat.
WSHP 1: Good
Climate Master Mod: GSW120AHC1XNFCA Ser: E12431082
-
Stage 1
HP: 165
SP: 65
Amps: 10.3
Voltage in: 216
Voltage out: 216
-
Stage 2
HP: 160
SP: 54
Amps 10.3
Voltage in: 216
Voltage out: 216
Source water in: 64.6
Source water out: 73.4
WSHP 2* SHORTED COMPRESSOR AND SIEZED COMPRESSOR**
Climate Master Mod: GSW120AHC1XNFCA Ser: E12431084
WSHP 3: Good
Climate Master
Mod: GSW120AHC1XNFCA
Ser: E12431085
-
Stage 1
HP: 155
Sp: 60
Amps: 10.4
Voltage in: 214
Voltage out: 214
-
Stage: 2
HP: 170
Sp: 60
Amps: 10.4
Voltage in: 214
Voltage out: 214
Source water in: 63.4
Source water out 72.2
WSHP 4: Good
Climate Master Mod: GSW120AHC1XNFCA Ser: E12431086
Stage 1
HP: 158
Sp: 68
Amps: 9.7
Voltage in: 214.8
Voltage out: 214.8
-
Stage 2
HP: 160
Sp: 55
Amps: 9.5
Voltage in: 214.6
Voltage out: 214.6
Source water in: 62.4
Source water out: 71.2
WSHP 5: 1/2 Working
Climate Master Mod: GSW120AHC1XNFCA Ser: E12431087
Stage 1** COMPRESSOR SHORTED TO GROUND**
HP
Sp
Amps
Voltage in
Voltage out
-
Stage 2
HP: 168
Sp: 63
Amps: 10.5
Voltage in: 216
Voltage out: 216
Source water in: 63.5
Source water out: 68.1
WSHP 6: Good
Climate Master
Mod: GSW120AHC1XNFCA
Ser: E12431089
-
Stage 1
HP: 162
Sp: 67
Amps: 10.2
Voltage in: 216
Voltage out: 216
-
Stage 2
HP: 170
Sp: 60
Amps: 9.5
Voltage in: 216.9
Voltage out: 216.9
Source water in: 63.4
Source water out: 71.5
WSHP 7: Down
Climate Master
Mod: GSW120AHC12NFCS
Ser: E13942637
-
Stage 1**NEEDS LEAK CHECK**
-
Stage 2**BAD COMPRESSOR**
WSHP 8: 1/2 Working but needs maintenance
Climate Master
Mod: GSW120AHC1XNFCA
Ser: E12431083
-
Stage 1 **LOW ON CHARGE**
HP: 150
Sp: 46
Amps: 10.2
Voltage in: 216
Voltage out: 216
-
Stage 2** NEEDS LEAK CHECK**
Source water in: 63.3
Source water out: 67
State of the Heat Pumps September 2017:
Findings are as follows:
Hp1- Found both circuits 1 and 2 to be starting correctly and running. Circuit 1 is slightly low on refrigerant.
Hp2- Found circuit 1 compressor shorted to ground and non-functional. Found circuit 2 comprerssor 2 ( not pumping), this compressor is non-functional as well. There was question on the relay working properly and we found it to be functioning normally. We did find that the Geo- water valve was working opposite as it was supposed to and we switched the wiring to work properly.
Hp-3 Found circuit 1 operating normally. Found circuit 2 slightly low on refrigerant.
Hp-4 Found circuit 1 is slightly low on refrigerant. Circuit 2 operating normally.
Hp-5 Found both circuits operating normally.
Hp-6 Found both circuits operating normally.
Hp-7 Found circuit 1 needs more troubleshooting, may just need more refrigerant or a Thermal expansion valve. Circuit 2 Has NO refrigerant in it and need to identify where the leak is and see if it is repairable.
Hp-8 Found circuit 1 operating normally. Circuit 2 is slightly low on refrigerant.
Also:
Units 4 and 5 both have water piping leaks that need to be repaired.
The existing valves that allow flow through the units from the well do not have end switches to verify there is well water flowing through the system.
Overall I found the majority of the system to be in good working order. And with some repairs we can get the entire system up to good working order.
Thank you, Jamie Rooney Vision Geo-Energy P.O. 99 Merrimac, Ma. 01860 978-904-1131
State of the Heat Pumps July 2016:
HEAT PUMP # 1: This unit is functional. I jumped out to run.
M# gsw120ahc1xnfca S# e12431082
Ckt #1
Low 56
High 170
Ckt#2 Low 58
High 165
Load water In. 58
Out 50 Source water In 77
Out 88
HEAT PUMP #2: Heat pump,trips breaker on start up. Does not run
M# gsw120ahc1xnfca S# e12431084
HEAT PUMP # 3: This unit is functional. Heat pump was running when arrived Ckt 1
M# Gsw120ahc1xnfca S# e12431085
Suction pressure. 56
High side. 185
Ckt # 2
Low side 55
High side 172 Load water
In 57
Out. 48 Source entering. 72
Leaving. 80
HEAT PUMP #4: This unit is functional.
M#gsw120ahc1xnfca S# e12431086
Ckt# 1
Low side. 55
High side. 175
Ckt# 2
Low side 54
High side 175
Heat pump was on when arrived Water entering temp. 72
Exiting. 81
HEAT PUMP,# 5: This unit is functional. It cycled on after I disconnected unit 3and 4
M#gsw120ahc1xnfca S# e12431087
Ckt # 1
Low. 55
High. 172
Ckt# 2
Low. 56
High. 176 Load water In. 53
Out. 46 Source water In 74
Out. 80.
HEAT PUMP #6: This unit is functional. It cycled on after I shut down heat pump 3 and 4
M# gsw120ahc1xnfca S#. E12431089
Ckt# 1
Low 52
High 170
Ckt # 2
Low 53
High. 175
Load water In 55
Out. 45 Source water In 73
Out 78
HEAT PUMP # 7: in fault after 3 min of running. No refrigerant Ckt# 2 In fault. Won't start No refrigerant
M# gsw120ahc12nfcs S#. E13942637
Ckt# 1
Low. 0
High. 120. Ckt
HEAT PUMP# 8: Ckt # 1. Ckt 1 came on after ckt 2 and ran for 15 seconds. No lock out code unit runs on 1 ckt
M#. Gsw120ahc1xnfca S# e12431083
Low High Ckt#2 Low. 49
High. 158
All GEO valves function and are in working order.
Upon arriving well pump # 1. 5HP well was on lockout. I reset and it continued to lock out. After 3rd time resetting well stayed on and continues to stay on. The previous 2 resets only kept well on for 5 min After reset pump would start and run, pump would then shut off without fault, after pump shut off temp would rise causing overheat lockout
Honeywell vfd Nxs0075b1002
There are only 2 heat pumps not functional. All others should be fine if set up correctly on network
October Transition from Cooling to Heating:
Phase 1: CHW temp set to 70. Heat pumps being shut down. Will switch to heat and begin progressive ramp-up tomorrow morning. (Using heat pumps for now.)
Phase 2, now: System warmed up to 70 degrees, as expected. Switched to heat; temperature reset set to demand 70-105 on outdoor temperatures from 65 to 38. Current setpoint 72.
Later, maybe: Boost low-end temperature setting gradually from 70 to 90.
Someone should change all the public thermostats. I’ll put out a message.
HomeRun Systems:
Photographs of the schematic for our HomeRun control boards are on Bob Melvin's flickr stream: http://www.flickr.com/photos/melvin-rochlin/6807657428/in/photostream
The designer and original builder of these boards is in Jason Wolfson, CEO of AirCycler, at 411 Plain St., Marshfield, MA 02050. Phone number is 781-834-1600, and website is www.aircycler.com.
Randell approves replacing existing fans with Orion A172SAP-11-1TBXC.
These are available from multiple online merchants for under $50 each,
they provide an air flow greater than the existing Sunta or Nidec fans
that are commonly found in our fan coils. The performance we're seeing from single Orion fans is excellent even in comparison with the dual-stack counter-rotating fans.
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