Troubleshooting guide

ManualsBrandsMicro Control ManualsComputer equipmentMCS-BMS-GATEWAY

131

132

133

134

135

136

137

138

139

140

MAGNUM VERSION 8 MANUAL REVISION 3.1

134

12. Relay Output Sequences

The sequence of Relay Outputs must be correctly matched to the particular type of compressor being

controlled. Relays are required unless marked as optional. If a relay is optional and it is not used then its

position is skipped and the following relays will be moved up. Compressor type selection as displayed in

MCS-Config is shown within brackets.

12.1. Reciprocating Compressors (Recip Comp w/Oil) and (Recip Comp w/o

Oil)

Compressor relay

Part winding compressor relay (OPTIONAL)

Liquid line solenoid

Unloader 1 (OPTIONAL)

Unloader 2 (OPTIONAL)

Unloader 3 (OPTIONAL)

Oil pump (OPTIONAL, ONLY USED WITH Recip Comp w/Oil)

Oil heater (OPTIONAL, ONLY USED WITH Recip Comp w/Oil)

Hot gas bypass (OPTIONAL)

Common Hot gas bypass (OPTIONAL)

Liquid injection (OPTIONAL)

Fast unloader (OPTIONAL)

Second liquid line solenoid (OPTIONAL)

Oil equalization (OPTIONAL)

Oil seal cooler (OPTIONAL)

VI increase valve % (OPTIONAL)

VI decrease valve % (OPTIONAL)

Start unloader bypass (OPTIONAL)

Low disc superheat (OPTIONAL)

Hot gas reheat off (OPTIONAL) If hot gas reheat all 3 hot gas relays are required.

Hot gas reheat on (OPTIONAL)

Hot gas reheat bleed (OPTIONAL)

Third liquid line solenoid (OPTIONAL)

Reversing valve (heat pump) (OPTIONAL)

Liquid injection #2 (OPTIONAL)

Mod motor (OPTIONAL)

12.2. Screw Compressor with Oil (Screw Comp w/Oil)