Modcon Vwh Cascade Follower Pump And Sensor Wiring - Heat Transfer MODCON VWH 300 LP Installation & Maintenance

PART 8: FIELD WIRING
Fig. 8-4
N. MODCON VWH CASCADE FOLLOWER
PUMP AND SENSOR WIRING
1. If it is desired to have the boiler control the
boiler pump, Connect the boiler pump to the
BOILER HOT, BOILER NEUT, BOILER GND
terminals
2. Connect the tank sensor(s) or return sensor
to the terminals marked TANK SENSOR on
the follower boiler addressed as 1. There are
no connections to these terminals on other
GAS-FIRED HOT WATER SUPPLY BOILER
(CONTINUED)
MOD CON VWH Cascade Follower
follower boilers in the system.
3. Do not connect anything to the OUTDOOR
SENS, 0-10V or THERMOSTAT terminals.
4. If it is desired to monitor the boiler system to
detect a lockout condition, a dry contact
alarm relay is provided. Please see Figure 8.4
for wiring suggestions for this relay. Note that
the alarm output of the boiler addressed as 1
will be active for lockout alarms both on
boiler 1, as well as on the master boiler.
Boiler Manual
LP-248-VWH Rev. 7/10/09
50