Dimplex CMH Series Installation Instructions

Ceiling Heater
CMH Series

IMPORTANT INSTRUCTIONS

When using electrical appliances, basic precautions should
always be followed to reduce the risk of fire, electric shock
and injury to person, including the following:
1. Read all instructions before using this heater.
2. The heater is hot when in use. To avoid burns, do not let
bare skin touch hot surfaces. Keep combustible materi-
als, such as furniture, pillows, bedding, papers, clothes,
and curtains at least a 3.3 ft (1 m) from the front of the
heater and keep them away from the sides and rear.
3. Wiring procedures and connections should be in accor-
dance with the National Electric Code (NEC & CEC) and
local codes.
4. Extreme caution is necessary when any heater is used
by or near children or invalids and whenever the unit is
left operating and unattended.
5. Do not operate any heater after it malfunctions. Discon-
nect power at service panel and have heater inspected
by a certified electrician before reusing.
6. To disconnect heater, turn off power to heater circuit at
main disconnect panel.
7. Do not use outdoors.
8. Use this heater only as described in this manual. Any
other use not recommended by the manufacturer may
cause fire, electric shock, or injury to persons.
9. A heater has hot and arcing or sparking parts inside. Do
not use it in areas where gasoline, paint or flammable
liquids are used or stored.
10. This heater is hot when in use. To avoid burns, do not let
bare skin touch hot surfaces. Keep combustible materials
such as: furniture, pillows, bedding, papers, clothes and
curtains away from heater.
11. Do not insert or allow foreign objects to enter any venti-
lation or exhaust opening as this may cause an electric
shock or fire, or damage the heater.
12. To prevent a possible fire, do not block air intake or ex-
haust in any manner.

SAVE THESE INSTRUCTIONS

Figure 1
7.5 - 10 kW
Mounting
Bracket
Terminal
Box Cover
2 - 5 kW
Terminal Box Cover

Installation Instructions

WARNING: Wiring procedures and connections should
be in accordance with the National Electric code (NEC) and
local codes.
WARNING: To reduce the risk of fire, do not store or use
gasoline or other flammable vapors and liquids in the vicinity
of the heater.
CAUTION: It is recommended that two people install the
unit.
CAUTION: The heater should be mounted for DOWN-
WARD discharge only.
Surface Mount
1. Unpack the heater from the carton and remove the two
screws securing the bracket to the unit, to remove the
mounting bracket, and remove the terminal box covers.
(Figure 1)
2. Determine the desired location for the heater and se-
cure the mounting bracket to the ceiling (hardware not
included).
CAUTION: The ceiling and mounting hardware must have
adqueate strength to support the heater. Attachment to a firm
support is a necessity.
!
NOTE: See Figure 2 for minimum clearances for the unit.
3. Remove the desired knockout from the terminal box.
!
NOTE: It is only necessary to remove the knockout(s)
that will feed the power supply wiring, keeping in mind the
heater mounting location and supply wire location.
4. Hang the heater from the hooked edge of the mounting
bracket and proceed to the wiring instructions.
Hanging Mount (Threaded Rod)
1. Unpack the heater from the carton and remove the two
screws securing the bracket to the unit, to remove the
mounting bracket and terminal box cover. (Figure 1)
!
NOTE: See Figure 2 for minimum clearances for the unit.
2. There are four brackets on the top surface of the unit
with 1/2 in. (13 mm) threaded holes which can be used to
suspend the unit from an open ceiling using 3/8 in. (9.5
mm)
Wiring
WARNING: Wiring procedures and connections should
be in accordance with the National Electric Code (NEC) and
local codes.
1. Run branch circuit wiring of proper voltage and wire
size to the location of the terminal box of the heater.
(See Table 2 for line amperes) Control wiring should be
enclosed in 1/2 in. (13 mm) conduit.
2. Wire all heaters and controls in accordance with the ap-
propriate wiring diagram.
!
NOTE: Sample wiring diagrams are located on the last
page, wiring diagram for specific unit is located on top of the
7213190100R03