Honeywell T4398B - Manual (Page 6)

T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT
69-1604 6
Fig. 7. Calibrating the thermostat.
Security Features
To install the locking cover (select models (Fig. 8):
1. Remove cover by swinging up from the bottom.
2. Insert the Tinnerman Speed Nut® (supplied) into the
slot at the lower rear thermostat base.
3. Drive Allen screw into Speed Nut until head is flush with
lower edge of thermostat base.
4. Reinstall cover and lock by backing out Allen screw until
screw body protrudes through cover hole.
5. To unlock cover, drive Allen screw into thermostat base
until screw body clears cover.
Fig. 8. Installing locking cover.
To install the range stops (select models) (Fig. 9):
1. Set thermostat to desired setpoint and remove the
cover.
2. Install plastic dowels (supplied) into minimum and/or
maximum range stop holes on the back of the cover.
3. Reinstall the cover and check range stop operation.
Fig. 9. Installing range stops.
M5796
THERMOSTAT
BASE
SETTING KNOB
AT 12 O'CLOCK
POSITION
SETTING KNOB
SCALE RING
80
75
70 65
60
55
50
M5798
ALLEN WRENCH
THERMOSTAT
COVER
LOCKING
COVER
CLIP
THERMOSTAT BASE
LOCKING
COVER SCREW
M5801
2
4
20˚
C 16
12
7
5
70
65
60
55
BACK OF
THERMOSTAT
COVER
INSERT RANGE
STOP PINS IN
SLOTS.