Laars Mighty Max VW Series, Инструкции по установке, эксплуатации и обслуживанию

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LAARS HEATING SYSTEMS
5C-2. Electrical Troubleshooting
Troubleshooting procedures should only be
performed by professional service technicians
qualified in heater maintenance.
Some electrical components are wired in
parallel, so it is necessary to troubleshoot in the order
that they appear on the wiring diagram or the
troubleshooting flow chart (see Figure 19).
The following steps should be used when
troubleshooting the heater:
1. Remove the lower front panel (see Figure 20).
Caution
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
SECTION 6
Parts List for Mighty Max VW Heater
6A. General Information
To order or purchase parts for the Laars Mighty
Max VW heater, contact your nearest Laars contractor
or distributor. If they cannot supply you with what
you need, contact:
Customer Service Department
Laars Heating Systems
6000 Condor Drive
Moorpark, California, 93021
Telephone (805) 529-2000
20 Industrial Way
Rochester, New Hampshire, 03867
Telephone (603) 335-6300
In Canada, contact:
Customer Service Department
Laars Heating Systems
480 S. Service Road West
Oakville, Ontario, Canada L6K 2H4
Telephone (905) 844-8233
Item Description Part Number
1. Base Assembly
320M ........................................................... 20157801
400M ........................................................... 20157802
520M ........................................................... 20157803
625M ........................................................... 20157804
775M ........................................................... 20157805
1000M ......................................................... 20157806
2. Burner and Burner Plenum Weldment
320M ........................................................... 20268401
400M ........................................................... 20268402
520M ........................................................... 20268403
625M ........................................................... 20268404
775M ........................................................... 20268405
1000M ......................................................... 20268406
3. Venturi Assembly
320M ........................................................... 20158601
400M ........................................................... 20158602
520M ........................................................... 20158603
625M ........................................................... 20158604
775M ........................................................... 20158605
1000M ......................................................... 20266400
Figure 20. Lower Front Panel Removal.
2. Turn the manual gas valve on the heater off.
3. If the heater has locked out turn the toggle
switch off for 5 seconds then back on to reset the
heater.
4. Use the troubleshooting flow chart (Figure 19) to
determine what components and wiring should
be tested first.
5. Test each component by checking for 24 Vac or
120 Vac entering and exiting the device. If there
is voltage entering the safety device, but none
leaving then there is an open circuit and it must
be determined why it is open. When testing
components between “MV1” of the ignition
control and the gas valve install a meter and let
the heater cycle through one complete sequence
of operation. During the sequence of operation
these safeties will only be energized for the
seven second trial for ignition.
6. Turn the manual gas valve on the heater on and
fire the heater.