Helmer Scientific i.Series
®
and Horizon Series
™
Refrigerator - Pass-Thru
Service and Maintenance Manual
360429/A
55
12 Service
12.1 Refrigerant
Risk of fire or explosion. Flammable refrigerant used. To be repaired only by trained service personnel. DO NOT puncture
refrigerant tubing.
NOTICE
• Review all safety instructions prior to recharging refrigerant.
• Maintenance should only be performed by trained refrigeration technicians.
Full initial refrigerant charge varies by model and power requirements which can be found on the product specification label and in
the table below.
Table 13. Refrigerant Charge
Model
Refrigerant
Power
Requirements
Initial Charge
226
R290
115V, 60 Hz
220-240V, 50/60 Hz
4.2 oz. (120g +/- 1g)
458
R290
115V, 60 Hz
220-240V, 50-60 Hz
5.2 oz. (148g +/- 1g)
12.2 Replace LED Lamp Strip
1. Switch main power switch OFF; disconnect backup battery.
2. Using a #2 Phillips screwdriver, remove lamp strip from chamber wall.
3.
Disconnect wire from the first LED at top of strip and remove strip from refrigerator.
4.
Install new LED lamp strip and connect wire to first LED at top of the strip.
5. Using a #2 Phillips screwdriver, attach lamp strip to chamber wall.
6. Switch AC power switch ON; reconnect backup battery.
7. Turn light switch on or open door to test lamp.
8. Press MUTE button to disable high temperature alarm while refrigerator reaches operating temperature.
Horizon Series