WattMaster Water Source Heat Pump, Installation & Operation Manual

Page: 39 / 126

WattMaster WHP Section 2
Installation and Wiring 2-15
Rev. Valve-On/Off
Fan-On/Off
24VAC
Compressor-On/Off
Heat Pump Reset
Aux. Heating Or Cooling
Water Source Heat Pump
Unit Connections
WHP Controller
R
SH
T
R
SH
T
R
SH
T
R
SH
T
All Comm Loop Wiring Is
Straight Thru
Required VA For Transformer
Each WHP Controller = 10VA MIN.
24VAC
GND
Mount In HVAC
Unit Supply
Air Duct
Dirty Filter
Alarm Contact
Lockout
Optional Features
Discharge
Air Temp.
Sensor
AOUT
GND
GND
AIN
5
AIN
1
AIN
2
AIN
3
AIN
4
12V
GND
AUX
TMP
NORMAL
OVR
R
E
L
O
C
R
E
M
R
O
A
W
COMM
REC.
LD4
T
R
SHLD
GND
24VAC
PWR
COMM
TEST
RELAY
OUTPUTS
COM
4-5
OUT
1
OUT
2
OUT
3
OUT
4
OUT
5
COM
1-3
Room Sensor
Diagnostic Blink Code LED
R
A
M
E
P
R
O
M
Thermowell
Or Surface Mount
Temp Sensor
(Leaving Water Temp)
Local Loop
RS-485
9600 Baud
Connect To
Next Controller
And/Or
MiniLink On
ADDRESS ADD
Connection To
AUX Terminal is Reqd
Only When Sensor
Is Specified With
Slide Adjust Option
CAUTION!
WHP CONTROLLERS
MUST HAVE ADDRESS SWITCHES
SET BETWEEN 1 AND 30
(UP TO 30 UNITS PER LOCAL LOOP)
EXCEPT ON THE LOOP WITH THE
LOOP CONTROLLER CONNECTED.
THE LOOP CONTROLLER ADDRESS
IS 30, WHICH ALLOWS FOR ONLY
29 WHP CONTROLLERS ON THIS
LOCAL LOOP.
Figure 2-11: WHP Controller Wiring
Warning:
Polarity is
very
important when connecting power to the controllers!
The grounded side of the control transformer must be connected to
the terminal labeled GND on the WHP Controller. If a single
transformer is used to power more than one WHP Controller you
must connect GND-to-GND and 24VAC-to-24VAC on each WHP
Controller. Failure to observe polarity will result in
damage to one or more components in your
system.
Warning:
Use
extreme
care not to damage any of the electronic components
while mounting the backplate. Mark the holes then remove the WHP
Controller from the backplate before drilling.
Do not allow metal shavings to fall onto the circuit boards.