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Monessen Hearth DFS42NVC User Manual

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20 
71D0532
ELECTRICAL WIRING
A.  COMPLETE MILLI-VOLT SYSTEM CHECK 
   
(“A” Reading - Thermostat contacts CLOSED - Control Knob “ON” - Main burner should turn ON)
 
a.  If the reading is more than 100 milli-volts and the automatic valve still does not come on, replace the control.
 
b.  If the closed circuit reading (“A” reading) is less than 100 millivolts, determine cause for low reading, proceed 
to Section B below. 
B.  Thermopile Output Reading Check 
(“B” Reading - Thermostat contacts OPEN - Main burner OFF)
 
1.  Check gas pressure to the unit. If gas pressure is within minimum and maximum on data plate, then check pilot 
voltage, 325 millivolts minimum. If the minimum milli-volt reading is not obtainable, replace pilot.
 
 
 
CONNECT SWITCH 
OR
 CHECK 
TO 
METER 
THERMOSTAT 
METER
 TEST 
TEST 
LEADS 
TO 
CONTACTS 
READING
  
 
TERMINALS 
 
SHOULD 
BE
 
A 
COMPLETE 
2 & 3 
CLOSED 
CLOSED
  
SYSTEM
 
B 
THERMOPILE 
1 & 2 
OPEN 
OPEN
  
OUTPUT 
CHECKING SYSTEM OPERATION
The milli-volt system and individual 
components may be checked with a milli-
volt meter having a 0-1000 mV range. 
Conduct each check shown in chart below 
by connection meter test leads to terminals 
as indicated.
CONNECTING REMOTE RECEIVER
THESE INSTRUCTIONS SUPERCEDE THE SECTION 
ENTITLED “HEARTH MOUNT” IN THE MILLI-VOLT 
HAND-HELD REMOTE INSTRUCTIONS SUPPLIED 
WITH THE REMOTE.
  1.  Remove cover on control panel to show opening for remote 
receiver. See Figure 18. 
  2.  Connect the remote connectors located in the unit.
  3.  Slide remote receiver in the opening of control panel. Use 
two screws provided to attach remote receiver to the control 
panel. See Figure 18. 
 4. Replace 
Cover. 
NOTE: Do not place remote in combustion chamber. 
Figure 18 - Installing Remote Receiver 
Remote 
Receiver 
Cover