COOK HMD Manuel d'installation, d'utilisation et d'entretien - Page 3

Parcourez en ligne ou téléchargez le pdf Manuel d'installation, d'utilisation et d'entretien pour {nom_de_la_catégorie} COOK HMD. COOK HMD 17 pages. Heated makeup direct: a direct fire make-up air unit

Imprimer la page

NOTICE! When a duct work system is attached to the

inlet of the heater purge the volume of the duct system

with at least four air changes prior to an ignition

attempt.

6. Apply sealant around the perimeter of the weather-

hood to prevent water penetration and drafts into the

building.

Curb Arrangement

Position curb on the roof. Verify that unit supports are lev-

el, shim if necessary.

Attach curb to roof, flash in place

Attach ductwork to unit using self-tapping screws

Good duct practices should be followed for all duc-

twork. Ductwork should be installed in accordance

with SMACNA and AMCA guidelines, NFPA 96 and

any local codes.

4. Apply an appropriate sealant around the perimeter of

the curb and duct adapter(s) to isolate fan vibration and

prevent water penetration

Use the 4 lifting lugs to lift and place unit on the curb. A

crane with a spreader bars is required.

NOTICE! Do not include a wood nailer. Use self-tapping

sheet metal screws to fasten the unit to the curb support.

The weatherhood can now be assembled and attached to

the unit.

Using an appropriate sealant, seal the seam between the

weatherhood and the unit.

Curb Mount Example

Wiring

In Canada, all wiring should be done in

accordance with the Canadian Electrical Code.

NOTICE! The equipment must be properly grounded.

Any wiring running through the unit in the airstream

must be protected by metal conduit, metal clad cable

or raceways.

NOTICE! If any of the original wire as supplied with

the heater must be replaced, it must be replaced with

type TW1 600v wire or its equivalent.

NOTICE! Field-wiring having a temperature rating of

at least 105ºC shall be used and supply circuit wiring

shall have a minimum size of 14 AWG.

NOTICE! High voltage electrical input is needed for

this equipment.

An electric disconnect switch having adequate am-

pacity (see marking on the heater for voltage and

ampacity), if not provided as part of the heater,

shall be installed in accordance with Article 430 of

the National Electrical Code, ANSI/NFA 70.

HMD IO&M

Custom Work:

Any wiring deviations may result in personal injury or

property damage. Manufacturer is not responsible for

any damage to, or failure of the unit caused by incor-

rect final wiring.

Manufacturer's standard control voltage is 120 VAC.

Control wire resistance should not exceed 0.75 ohms

(approximately 285 feet total length for 14 gauge wire;

455 feet total length for 12 gauge wire). If the resis-

tance exceeds 0.75 ohms, an industrial-style plug-in

relay should be wired in place of the remote switch.

The relay must be rated for at least 5 amps and have

a 120 VAC coil. Failure to comply with these guidelines

may cause motor starters to chatter or not pull in, re-

sulting in contactor failures and/or motor failures.

1. The unit's nameplate states the voltage and the

unit's MCA. The main power lines to the unit should

be sized accordingly. The nameplate is located on

the outside of the unit on the control panel side.

2. Install field electrical wires through the provided

holes.

3. Connect the main power lines to the disconnect

switch and main grounding lug(s). Torque field con-

nections to 20 in.-lbs.

4. Wire the optional convenience outlet. The conve-

nience outlet requires a separate 115V power supply

circuit. The circuit must include short circuit protec-

tion which may need to be supplied by others.

Single Phase

Ground A

T-1

T-4

Ground B

When ground is required, attach to ground A or B with no. 6

thread forming screw. To reverse, interchange T-1 and T-4.

Three Phase

3 Phase, 9 Lead Motor

Y-Connection

Low Voltage

High Voltage

208/230 Volts

460 Volts

4 5 6

7 8 9

1 2

L 1 L 2 L 3

A complete wiring diagram is attached on the in-

side of the control center door(s). It is also avail-

able in the HMD Wiring Diagram Supplement.

Gas

All gas piping must be installed in accordance with

local codes, or in the absence of local codes, in ac-

cordance with the National Fuel Gas Code, ANSI

2223.1/NFPA 54, or the CAN/CSA B149.1 Natural

Cas and Propane Installation Code.

L 1

Line

L 2