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3 60-2481—2
R182J, R482J, R845A, R847A, R882J, RA89A, RA832A
SPECIFICATIONS • INSTALLATION
a
IMPORTANT: The transformer on the R182 can over-
heat when used with a series 20 thermostat if the
total resistance of the thermostat (including thermo-
stat wire and thermostat contact resistance) exceeds
2.5 ohms, add a 100 ohm, 10 watt resistor between
the W and R terminals. Table 2 gives maximum
thermostat wire runs; if longer runs are necessary,
measure the resistance or add a 100 ohm, 10 watt
resistor across terminals W and R.
See Table 2 for the ratings of built-in transformer (all
transformers are rated at 120/240V, 50/60 Hz).
TABLE 2—TRANSFORMER RATINGS.
Fig. 1—Approximate mounting dimensions in
in. [mm].
4
[114]
1
2
1
[48]
7
8
3
8
[10]
3
8
[10]
5
32
1 [29]
1
4
4 [108]
1
2
3 [89]
5
[133]
1
4
3
32
[2] DIAMETER
1
2
[13] DIAMETER
KEYHOLE TYPE
MOUNTING HOLE
7
8
[22] DIAMETER
7
32
[6] DIAMETER MOUNTING HOLE
1
[48]
7
8
25
32
[20]
KNOCKOUT FOR
1/2 (13) CONDUIT (3)
3
8
1 [35]
M3823
2
[75]
15
16
WHEN INSTALLING THIS PRODUCT …
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out product operation.
Transformer Rating (watts)
R847A 7.0
RA89A 5.0
RA832A —
R845A —
R182J 6.5
FINISH: Gray enamel.
KNOCKOUTS:
Case bottom: (2) RA89A, RA832A, R845A; (3) Rl82J,
R482J, R882J.
All models have 1 wiring hole in case top.
All knockouts are for 1/2 in. [12.7 mm] conduit.
APPROVALS:
Underwriters Laboratories Inc. Listed: RA89A; RA832A,
R882J; R845A: File no. E4436, Guide no. XAPX.
R482J: File no. E14480, Guide no. NLDS.
R847A: File no. SA481, Guide no. SDFY.
Canadian Standards Association Certified: R482J; R882J;
R847A: File no. LR1620.
Installation
WARNING
ELECTROCUTION HAZARD.
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH.
Transformer core not bonded.
Disconnect power supply before wring to prevent
electrical shock or equipment damage.