Installation Guide

ManualsBrandsWestinghouse ManualsBoilersCondensing 95.1% Combination Liquid Propane Wall Mount Boiler/Water Heater with 199,000 BTU Input

WHL-648 Rev. 000 Rel. 002 Date 1.3.18

43

Connector

Description HT SELV

No. of Location Pin Board Silk

CN7

LWD1140-14

1

F.S Flame Sensor

SELV (5V)

8

2

OP.S Operating Water Temperature Sensor

9

3

DH.S DHW Temperature Sensor

10

4

I.S NOT USED

11

5

BG.S Exhaust Temperature Sensor

12

6

ST.S NOT USED

13

7

SP.S Overheat Temperature Sensor

14

CN14

SMW250-09

1

DHM

GND

SELV (14V)

2 DHM Stepper Motor Position

3 VDD

4 DHM Stepper Motor Coil X Phase

5 DHM Stepper Motor Coil Y Phase

6 VDD

7 DHW Stepper Motor Coil / X Phase

8

DHM Power IWM Stepper Motor Coil

/ Y Phase

9 NOT USED -

CN3

SMW250-06

4

FLUX1

VCC

SELV (5V)

5 Water Flow Sensor

6 GND

CN5

SMW250-10

1

RPM

Fan RPM Check

2 GND

Table 22 - Appliance Wiring 2

Figure 35 - Terminal Block Wiring Detail