Water Source Heat Pump Module
Technical Guide
10
Start-Up & Commissioning
General
In order to have a trouble free start-up, it is important to follow a few
simple procedures. Before applying power for the fi rst time, it is very
important to run through a few simple checks.
One of the most important checks to make before powering up the system
for the fi rst time is to make sure that the VCM-X WSHP Controller or
SA Controller is confi gured properly for your application. Refer to the
VCM-X Controller Technical Guide or SA Controller Technical Guide
for more information.
A handheld Modular Service Tool, Modular System Manager, or System
Manager Touch Screen connected to the VCM-X WSHP Controller
or SA Controller will allow you to confi gure your application. Refer
to the VCM-X Operator’s Interfaces Technical Guide, SA Operator
Interfaces Technical Guide, or System Manager TS Technical Guide
for more information.
NOTE: The SA Controller does not utilize the System Manager
Touch Screen.
Check all wiring leads at the terminal block for tightness. Be sure that
wire strands do not stick out and touch adjacent terminals. Confi rm
that all sensors required for your system are mounted in the appropriate
location and wired into the correct terminals.
WARNING: Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
Table 1: Unit Confi gurations Chart
UNIT CONFIGURATIONS
PERMUTATION
SYSTEM A SYSTEM B
VCM-X WSHP
CONFIGURATION
SA
CONFIGURATION
Comp A1 Comp A2 Comp B1 Comp B2
Relay 1 Relay 2 Relay 3 Relay 4
1 On/Off On/Off 2 Compressors
2 Digital On/Off
2 Compressors
Digital Compressor
2 Compressors
Single Unit SA
3 Digital Digital
2 Compressors
Full Digital
2 Compressors
Single Unit SA
4 On/Off On/Off On/Off On/Off 4 Compressors
5 Digital On/Off On/Off On/Off Not Available
6 Digital On/Off Digital On/Off
4 Compressors
Digital Compressor
4 Compressors
Dual Unit SA
7 Digital Digital Digital Digital
4 Compressors
Full Digital
4 Compressors
Dual Unit SA
In the Cooling Mode, the Compressors will stage in the following order:
Permutations 1, 2 & 3: Compressor A1 -> Compressor A2
Permutations 4: Compressor A1 -> Compressor B1 -> Compressor A2 -> Compressor B2
Permutations 6: Compressor A1 & Compressor B1 -> Compressor A2 -> Compressor B2
Permutations 7: Compressor A1 & Compressor B1 -> Compressor A2 & Compressor B2
In the Dehumidifi cation Mode, the Compressors will stage in the following order:
Permutation 4: Compressor A1 & Compressor B1 -> Compressor A2 -> Compressor B2
All other permutations in the Dehumidifi cation Mode stage as described in the Cooling Mode.
(12 paginas)
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