Sigma 30-H, 40-H, 47-H, 58-H, 62-H Installation And Operation Manual

MANUFACTURERS

OF H YDRONIC

H EATING

P

RODUCTS

Unit Heaters

Installation and Operation Manual

www.sigmaproducts.com Tel: (905) 453

-0446 Fax: [phone]

Rev 2

I NSTALLER’S R ESPONSIBILITY

This equipment has been inspected, tested
and shipped free of defects. However, it is

the installer’s responsibility to check for
loose wires, leaks, or loose fasteners, and
correct any problem that may be found.
Inspect the equipment immediately when
received to determine if there is any damage
from shipment. First, check for visible
damage to the unit. Turn the fan by hand to
determine if any damage has occurred. If
any damage has been found, the receiver
should note the damage on the bill of lading
and immediately file a claim with the
transport company.

It is the equipment owner’s responsibility to
provide any scaffolding or other apparatus to
allow service or periodic maintenance to this
equipment.

INSTALLATION

Unit Heaters

Installation & Operation Manual

1

www.sigmaproducts.com Tel: (905) 453

-0446 Fax: [phone]

Warning: Disconnect all power, steam,
or water supplies before installing or
servicing the unit. Do not depend on a
thermostat or other switch as sole means
of disconnecting power. Always
disconnect power at the main breaker.

Caution: Insure that all power sources
conform to the requirements of the unit
heater or damage to the unit will result.
All external wiring and piping must
conform to the local and national codes.

Warning: Improper installation,
adjustment, alteration, service, or

maintenance can cause damage, injury, or
death. Read this manual thoroughly before
installing, operating, or servicing.

Rev 2

U NIT MOUNTING

Install unit heaters to meet Occupational
Safety and Health Act (OSHA). Unit heaters

mounted less than 8 feet (2.4 meters) above
the floor must be equipped with a fan guard.
Ensure that all hardware used in the
suspension of each unit heater is more than
adequate. Failure to do so may result in
extensive property damage, severe personal
injury, or death.

Suspension nuts are provided on the top of
all models. Support rods should be installed
so that they support the total weight of the
unit heater to assure that no strain is placed
on the supply and return piping. Provisions
for removal of the unit from the suspension
rods may be desirable for future servicing.
Otherwise, the provision of sufficient
clearance around the unit heater for future
maintenance and servicing is required.

Note: Increasing clearance distances may
be necessary if there is any possibility of
distortion or discoloration of adjacent

materials.

It is assumed that the type of system to be
used has been selected by the design
engineer. The diagrams shown in the
manual are for different types of steam or
hot water systems.

It is important that the system be kept clean
and free of foreign substances, such as

excessive joint materials, etc.

For steam systems it is recommended that
the unit be mounted level for proper
condensate drainage. Swing joints should be
used in piping, and piping should be pitched
down so condensate can drain freely.

Isolators are not required, but may be
desirable for some applications. Refer to
dimensional drawings for unit weights.

Hanging hardware is not included with the
unit (to be field supplied).

Place unit heaters at points of greatest heat
loss. Blanket outside doorways and provide
ample coverage of window areas. Keep the
unit heaters away from objects that will
impede the full and natural air delivery of the
units.

PIPING

Refer to the appropriate model dimensional
drawing to determine the piping connection
type, size, and location. Follow standard
practices and codes when installing piping.
Provide swing joints for expansion purposes,
unions and shut-off valves for servicing
purposes, as well as valves and traps for
control purposes. Refer to Typical Piping
Connections Diagrams for details.

Unit Heaters

Installation & Operation Manual

2

www.sigmaproducts.com Tel: (905) 453

-0446 Fax: [phone]

Rev 2

Important: Unit heaters must be hung

level from side to side, and front to back.
Failure to do so will result in poor
performance and/or premature failure of
the unit.