Deliming Solvents; Tank Cleanout Procedure; Troubleshooting Ignition Module System - Lochinvar CG 120 Installation Operation & Maintenance

Commercial gas, glass-lined, tank-type water heater
Table of Contents

Advertisement

Observe handling instructions on label of product being used.

TANK CLEANOUT PROCEDURE

The following practices will ensure longer life and enable the unit
to operate at its designed efficiency:
1. Once a month the heater should be flushed. Open drain valve and
allow two gallons of water to drain from heater. Inlet water valve
should remain open to maintain pressure in tank.
2. A cleanout opening is provided for periodic cleaning of the tank.
Gas must be shut off and heater drained before opening cleanout.
To clean heater through cleanout opening, proceed as follows:
1. Drain heater.
2. Remove outer cover plate from lower side of heater jacket.
3. Remove six (6) hex head screws securing tank cleanout plate
and remove plate.
4. Remove lime, scale, or sediment using care not to damage glass lining.
5. Inspect cleanout plate gasket, if new gasket is required, replace
with part 9004099215.
6. Install cleanout plate. Be sure to draw plate up tight by tightening
screws securely.
7. Replace outer jacket cover plate.
In some water areas the sediment might not be removed by this
method and may result in the water heater making rumbling or
CAUTION
boiling noises. To dissolve and remove these more stubborn
mineral deposits, UN•LIME Professional Delimer should
be used.
TROUBLESHOOTING
IGNITION MODULE SYSTEM
Before calling your service agent, the following checklist should
be examined to eliminate obvious problems from those requiring
replacement or servicing.
— Check that "main manual gas shut-off valve" is fully open and
that gas service has not been interrupted.
— Check that after following the appliance OPERATING
INSTRUCTIONS, the "Top Knob" of the appliance gas valve
is in "ON" position.
— Check electrical supply to the appliance for possible blown (or
tripped) fusing or power interruption.
— Is the water temperature in tank below the thermostat dial
setting on the appliance thermostat (calling for heat)?
— It is possible that the high limit (E.C.O.) has functioned to shut
off the appliance. See FEATURES — Water Temperature
Control for reset procedure. Contact your serviceman if limit
continues to function to shut off appliance.
30

Advertisement

Table of Contents
loading

This manual is also suitable for:

Cg n 120 thru 400a

Table of Contents