HTP PHR199-55C - Manual (Page 48)

48
LP- 325 REV. 3.21.14
B. FIELD WIRING
All connections made to the appliance in the field are
done on the field connection board located in the
cabinet on the top left area of the unit. Multiple
knockout locations are available to route field wires
into and out of the cabinet.
The appliance is capable of directly controlling 2
pumps when in standard mode and 3 pumps when
configured as a cascade master appliance. When
configured as a standard unit, each pump output can
provide a maximum of 3 amps at 120 volts. If pumps
require more than this amount of power, an external
contactor or motor starter is needed.
If the appliance is configured as a cascade master, the
boiler pump output is a dry contact output capable of
switching 5 amps at 120 volts in addition to the system
pump and DHW pump outputs sourcing 3 amps each.
An alarm bell or light can be connected to the alarm
connection of the appliance. In the event of an alarm,
the alarm connection may be used to power a 120V
device. The alarm connections are rated 3 amps at
120 VAC.
The field connection board has separate, clearly
marked terminal strips for line voltage and low voltage
wiring. Special jacks are provided for trouble-free
cascade system wiring using standard CAT3 or CAT5
patch cables.
C. LINE VOLTAGE WIRING FOR STANDARD
APPLIANCE
1. Connect the incoming power wiring to the line
voltage terminal strip in the field connection board at
terminals 120V, Neutral, Ground. A line voltage fused
disconnect switch may be required to be externally
mounted and connected according to local codes that
may apply.
2. Connect the central heating pump to the terminals
marked 8 (HOT), 2 (NEUT), 3 (GND) in Figure 24. The
connections shown are suitable for a maximum
continuous pump draw of 5 amps at 120 volts. If the
pump requires more current or voltage other than 120
volts, an external motor starter or contactor will be
required.
3. If using DHW, connect the domestic hot water pump
as shown to the terminals marked 4 (HOT), 5 (NEUT),
6 (GND). The connections shown are suitable for a
maximum continuous pump draw of 3 amps at 120
volts.
4. If a pump requires more current or voltage other than 120 volts, an external motor starter or contactor will be required.
D. THERMOSTAT
1. Connect the room thermostat to the terminals marked 14 and 15 on the field connection board. Any dry contact closure across these
terminals will cause the appliance to run. Caution should be used to ensure neither of the terminals connects to the ground.
2. Mount the thermostat on an inside wall as centrally to the area being heated as possible, but away from drafts or heat producing
devices such as television sets that could influence the ability of the thermostat to measure room temperature.
Figure 24 –Control Detail LP-325-P1