Tjernlund FFP-1 Fire & Freeze Protection Limit 8504115 - Manual

Tjernlund’s Model FFP-1, Fire and Freeze Protection Limit helps protect the boiler room from tem-
perature extremes. It is used with Tjernlund Series Commercial Combustion Air Systems. The FFP-1
is designed to disrupt power to a combustion air supply blower in the event of a boiler room fire or
an extended period where frigid outdoor air supply could cause pipes to freeze.
Do not wire an FFP-1 into a flue gas exhaust system or interuption of the exhaust system
may occur if boiler room temperature falls below Freeze Limit temperature setting.
SPECIFICATIONS
The Model FFP-1 is comprised of two UL Recognized Limit Switches factory wired and mounted
within a metal enclosure/electrical box.
Low Temperature Limit: Normally closed switch opens on temperature fall at 42°F ± 5°F;
automatic reset.
High Temperature Limit: Normally closed switch opens on temperature rise at 165°F ± 5°F;
manual reset.
Electrical Circuit Rating: 14 amps max. @ 120VAC; 10 amps max. @ 230 VAC and 460 VAC.
Metal Enclosure: Two knockouts facilitate electrical installation and connections to
either ½" or ¾" conduit.
Dimensions: 2 ½" H x 5" W x 2" D
PHYSICAL INSTALLATION
Always mount the Tjernlund Model FFP-1 on a flat, non-flammable vertical surface (wall or panel)
using the mounting hardware provided. For best results locate FFP-1 where it can monitor an
average ambient room air temperature.
ELECTRICAL INSTALLATION
When used as a component part of a Tjernlund Auto-Draft® Commercial Combustion Air System
follow applicable electrical schematic found in system wiring schematics. For other combustion air
installations, wire Limits in "series" with power supply of combustion air blower motor. Important:
Amperage draw through switches must not exceed electrical ratings shown above.
MODEL FFP-1 FIRE & FREEZE PROTECTION LIMIT
Tjernlund Products, Inc. • 1601 Ninth Street • White Bear Lake, MN 55110 • (651) 426-2993 • (800) 255-4208 • FAX (651) 426-9547 • www.tjernlund.com
P/N 8504115