McQuay M5MAC Guide de dépannage télécharger pdf (Page 38)

McQuay Service Guide Book

6.5 Sequential Controller

It is allowed to configure the controller to suit individual’s need with details below:

1. Models

For each type, there are 3 models for the control to configure into.

Dip switch 1 Dip switch 2 Dip switch 5

a. Cooling (SQCn) Off Off Off

b. Heatpump + no heater (SQHn0) On Off Off

c. Heatpump + 1 heater (SQHn1) Off On Off

d. Heatpump + 2 heater (SQHn2) On On Off

e. Auto heatpump + no heater (SQHn0) On Off On

f. Auto heatpump + 1 heater (SQHn1) Off On On

g. Auto heatpump + 2 heater (SQHn2) On On On

n denotes number of compressor(s)

where the postfix number indicates number of compressor(s).

2. Stage Differential Temperature

Differential temperature is the temperature difference between turning on or off 1 compressor to

another compressor in thermostat cycle.

The stage differential temperature can be selected from the range shown below:

Dip switch 3 Dip switch 4

a. Default Off Off

b. 0.5°C On Off

c. 1.0°C Off On

d. 1.5°C On On

Note that 1.5°C only valid for 2 and 3 compressors model. For 4 compressors model, maximum

allowed is 1.0°C.

The default differential temperature is base on number of compressor model, the setting is as below:

Model Diff. Temperature

1 compressor Not. Applicable

2 compressors 0.5°C

3 compressors 1.0°C

4 compressors 1.5°C

3. Hot Keep Option

Dip switch 6

a. Fan off Off

b. Fan on On

45. Operating Modes

The system has 4 operating modes to select with respect to each model selection:

Model Auto Cool Heat Fan

SQCn - X - X

SQHnh - X X X (Dip switch 5 = off)

SQHnh X X X X (Dip switch 5 = on)

Where x denotes modes available

n = number of compressor(s)

h = number of heater(s)

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 89 90

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McQuay M5MAC Guide de dépannage Page 38

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Produits connexes et manuels pour Climatiseurs à système divisé McQuay M5MAC