1385, boul. Lionel-Boulet, Varennes, Québec J3X 1P7 Toll Free: 1 888 514-8007
•
Tel: 438 338-1101
•
Fax: 450 922-5900
www.nagasinnovation.com
12
of
35
through the installed equipment.
All penetrations through the unit walls must be caulked and sealed to prevent air and/or water from entering
the unit.
NOTICE
DO NOT install anything that will interfere with equipment access or the rating labels.
THE FLOOR OF THE UNIT HAS BEEN MADE WATER-RESISTANT. DO NOT CUT OR DRILL HOLES IN THE FLOOR
OR USE PENETRATING FASTENERS.
NOTICE
-
Control voltage is as indicated on the rating label.
-
Follow the wiring diagram supplied with the equipment.
-
Field wiring to be done by a qualified electrician is denoted by dotted lines on the wiring diagram, solid
lines indicated factory wiring by the manufacturer.
CAUTION!
Screw terminals may become loose during equipment shipment; they should be retightened prior to
starting and operating unit.
3.
GAS CONNECTION AND PIPING
The gas inlet pressure should not exceed ½ psig (14 inches of water) for all the SDM-E series heaters.
If the gas inlet pressure exceeds ½ psig (14 inches of water), a high-pressure regulator must be installed. This
regulator must be suitable to modulate in a ratio of 40:1 to properly regulate gas pressure at low fire.
GAS
CONNECTIONS PIPE SIZE (NPT)
Capacity
≤ 750 MBH
from 751 MBH
to 1000 MBH
from 1001
MBH
to 2850
MBH
Diameter
¾ inch
1 inch
1 1/2 inches
Table 3: Gas pipe sizes
The table above should not be used to size the gas supply line.
4.
ELECTRICAL INSTALLATION
The unit must be electrically grounded, and all wiring must be installed by a qualified electrician in accordance
with the
National Electrical Code (ANSI/NFPA 70)
and/or the
Canadian Electric Code (CSA 22.1)
and to the
approval of the authorities having jurisdiction.
Field wiring diagrams and internal wiring diagrams are included in the control cabinet. The power requirements
are indicated on the rating label. See the field wiring diagram for requirements for shielded or twisted pair wire
for solid state devices.
WARNING!
No unspecified and unapproved external load shall be added to the control transformer circuit or to the main