INSTALLER’S GUIDE
ASYSTAT605 HEAT/COOLING THERMOSTAT
Fig 2. Mounting of sub-base
Fig 1. Thermostat with cover removed to show various parts
18-HD03D3-3
LOCATION
Locate the thermostat on an inside wall, since the temperature
of an outside wall varies with outdoor conditions.
The position on the inside wall should not be less than 18 inches
from the junction of an outside wall.
The vertical location should be between three and five feet above
the floor. The lower mounting has the advantage of being more
nearly in the zone of occupancy but is subject to furniture inter-
ference and to tampering by children.
The location should permit a free flow of air over the thermo-
stat.
Having made a tentative selection of the best mounting location,
check against the following possible objections:
1. Steam pipes, water pipes or warm-air stacks in adjacent
partition space;
2. Cold, unused room on opposite side of partition;
3. Kitchen range on opposite side of partition;
4. Subject to radiation from fireplace or direct sun effect from
windows;
5. Subject to drafts from stairwells or outside doors;
6. In direct path of air currents from radiators or air delivery
registers;
7. Heat from nearby table or floor lamps or television receiver.
© American Standard Inc. 1997
dwg. no. 21X144441 P02
MOUNTING AND WIRING
Having selected the most desirable location, proceed with mount-
ing and wiring as follows:
1. Pull cover from thermostat.
2. Remove the thermostat from the sub-base by loosening the
four screws. See Figure 1.
3. Mark the two desired mounting holes and the cable hole, us-
ing the subbase as a template.
It is recommended that the holes marked “B” be used for stud
mounting and the holes marked “C” be used for normal wall
mounting. See Figure 2.
4. Drill the three holes previously marked on the wall.
5. Make the connections to the thermostat sub-base in accor-
dance with the color code and the wiring diagram that applies.
See mounting instructions, Figure 2, and system wiring diagram,
Figure 3.
6. Fasten the sub-base to the wall with wood screws provided.
Push excess cable back into wall and
PLUG WALL OPENINGS
WITH PUTTY OR CAULKING COMPOUND
to prevent
drafts from affecting thermostat. Replace the thermostat on the
sub-base.
MAKE SURE THAT ALL FOUR SCREWS ARE
TIGHT.
7. Replace cover on thermostat.
8. Wiring must comply with local electrical codes and such
National Codes as apply.
ADJUSTABLE HEAT ANTICIPATOR
The heat anticipator in the thermostat is adjustable to the control
circuit current and is mounted in the thermostat as shown in
Figure 1. The current range is marked on the carton label.
To select the proper amount of heat anticipation, move the slider
on the anticipator assembly to the number on the scale corre-
sponding to the control circuit current of the primary control,
gas valve, or heating relay.
