Carrier 040-420 User Manual

Page 66

OUT MODULE (SIO) (Fig. 22) 4 In/4 Out mod-

ule allows the following features to be utilized:

Temperature Reset by outdoor air or space temperature.

A remote thermistor (Part No,

is also re-

quired.
NOTE: This accessory is

not

required for return water

temperature reset.

2. Temperature Reset by remote 4-20

signal.

3. Demand Limit by remote 2-stage switch.
4. Demand Limit by remote 4-20

signal

5. Dual Set Point by remote switch.

The options module is standard on

and

a s s o c i a t e d m o d u l a r c h i l l e r s a n d i s a v a i l a b l e a s a
field-installed accessory on

250, and 280

Flotronic II chillers.

Remember to reconfigure the chiller for each feature se-

lected (see Table 13). For temperature reset, demand limit,
and dual set point, desired set points must be entered through
keypad and display module (see Set Point Function section
on page 39).

See Table 17 for overall troubleshooting information.

J 7

P W R

ADDRESS
S W I T C H E S

LEGEND

Communications Bus

Power

Fig. 22

Out Module