Service Manual

25
6) A liquid charge is recommended when charging an R-134a system. Place the service
cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the
service cylinder, then place it on the scales. Open the high-side valve on the gauge
manifold.
7) Allow the system to charge with liquid until the proper charge weight is met.
8) Close the high-side valve on the gauge manifold, then close the refrigerant access valve
(if applicable). Disconnect the gauge manifold hose.
9) Cap the access valve to prevent a possible leak.
B. Component Service Information
NOTICE
When replacing a component listed below, see the notes to help ensure proper
operation.
Component Notes
Compressor Install a new drier and PTC relay.
Hot Gas Valve • Replace the strainer.
• Use copper tube of the same diameter and length when replacing valve lines.
Pump Motor F-0 and earlier units must order SP-5219: This kit includes pump motor 3A8334-01 and
wiring label.
For F-1 and later units, order 3A8334-01.
The 3A8334-01 pump motor does not utilize a capacitor or a ground wire.
Thermistor • Attach the new thermistor to the evaporator in the same location as the previous
thermistor.
• Smoothly ll the recessed area of the thermistor holder with high thermal conductive
type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink Compound
10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured by ShinEtsu
Silicones), or equivalent are recommended.
• Secure the thermistor with the holder.
• Be very careful to prevent damage to the leads.