Qmark MWUH Series - Horizontal / Downflow Unit Heaters Uživatelský manuál stáhnout pdf (Strana 3)

Mounting

1. Remove the mounting bracket from the heating unit by loos-

ening the bracket screws with a wrench and slipping the han-

dle off over the screw heads.

2. Locate a stud in the ceiling and attach the mounting bracket

to the ceiling joist as shown in Figures 4-A or 4-B. Place a

washer on the screw between the bracket and the ceiling to

act as a spacer and screw them into the stud. Tighten the

screws enough to securely hold the heating unit with the air

flow pointed in the proper direction.

3. Lift the heater up and into the mounting bracket. Align the

screws on each side of the heater with the keyhole slots in

the mounting brackets. If the heater is to be tilted, it must be

positioned in the lower keyhole slots (see Figure 5). Tighten

the bracket screws so the unit is securely suspended at the

desired position.

Wiring

1. To connect the power to the heater, simply remove the screw

from the front of the unit. This allows the hinged bottom to

open, providing access to the electrical wiring and connec-

tors. (See Figure 5)

2. Attach the cable connectors to the unit (See Figure 2) and

slide the 10 gauge wire through the cable connector. Pull

enough wire through the connector to work with when mak-

ing the the connections.

NOTE: Wiring compartment volume: 370 in

(6063 cm

)

3. Connect the wire to the power terminal block located in the

base of the heater (See Figure 6).

NOTE: Unit is 240/208 volts. When wiring a two conductor cable

with ground the white wire must be marked black by adding a piece

of black electrical tape to the wire near the point of connection.

NOTE: To decrease the heat output of the heating unit, see

Adjusting the Heat Output, Table 2 and Wiring Diagram Figure 7.

Adjusting the Heat Output

Heat output can be increased or decreased by switching wires at

the wattage change terminal board. The heater is factory wired

to deliver a heat output of 17,065 BTU per hour. Should your par-

ticular application require less heat output, refer to Table 2

below and change the wires at the wattage change terminal

board as shown in Wiring Diagram Figure 7.

TO PREVENT POSSIBLE ELECTRIC SHOCK, DISCONNECT

POWER TO THE HEATER AT THE MAIN SERVICE BOX

BEFORE ATTEMPTING TO ADJUST THE HEAT OUTPUT OF

THIS UNIT.

CEILING JOIST

WASHER

/8" DIAGONAL

LAG BOLT

BRACKET

EILING JOIST

WASHER

/8" DIAGONAL

AG BOLT

BRACKET

Figure 4-A

Figure 4-B

Single-Screw Mounting

Double-Screw Mounting

Figure 5

REMOVE SCREW TO OPEN DOOR

USE BOTTOM KEYHOLE

SLOTS IF HEATER IS

TO BE TILTED DOWN

BLK

ELEMENT

LIMIT

FAN

CONT.

C D A B

WATTAGE CHANGE

TERMINAL BOARD

GROUND

THERMOSTAT

L1 L2

POWER

TERMINAL

BLOCK

FIELD

WIRING

FAN

ALARM LIGHT

MOTOR

BLU

Figure 7 - Wiring Diagram

TABLE 2. HEAT OUTPUT ADJUSTMENTS

MAX

FUSE HEATER MOVE JUMPERS FROM

BTU/HR VOLTS WATTS SIZE AMPS C-D TO A-B

MODEL NO. MWUH5004A

17065 240 5000 30 20.9 None

14215 240 4165 25 17.4 Blue

11365 240 3332 20 13.9 Blue & Yellow

8533 240 2500 15 10.4 Blue, Yellow & Red

12799 208 3750 25 18.0 None

10659 208 3123 20 15.0 Blue

8533 208 2500 15 12.0 Blue & Yellow

6393 208 1874 15 9.0 Blue, Yellow & Red

MODEL NO. MWUH5008A

17065 208 5000 30 24.0 None

14215 208 4165 25 20.0 Blue

11365 208 3332 20 16.0 Blue & Yellow

8533 208 2500 15 12.0 Blue, Yellow & Red

208/240V - MWUH 5004A

208V - MWUH5008A

EEN

(or

Coppe

)

RMI

Figure 6

*NOTE: 240/208 volts. When wiring with a two conductor cable

with ground, the white wire must be marked black.

1 2 3 4 5 6 7 8 ... 19 20

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