SEKURE ITI UltraGard Manual de usuario descargar pdf (Pagina 20)

FURNACE WIRING

CAUTION: Always verify that the power to the furnace has been turned off before proceeding. Be sure to turn off

the furnace circuit breaker. AC line voltage can kill you.

NOTE: The two black furnace control wires are provided to ease the task of dressing or positioning the wiring in the

wall box after the furnace connection is complete.

Interrupt the furnace safety switch wiring as shown in Figure 19. Though

the furnace power may be interrupted at other locations, this is most

electrically convenient. As noted under General Installation Notes the

furnace power wiring should enter the UltraGuard 12V wall box on the

far right and from below the box. The solid wire from the furnace safety

switch should be as short, inside the box, as is convenient for connecting

to the UltraGuard 12V black stranded Furnace Cutoff pigtail.

After attaching the UltraGuard pigtail wires to the furnace wires, carefully

bend the solid furnace wires against the right side of the wall box and as

far to the back as possible. This will reduce the stress on the barrier as the

flexible stranded wire is pushed into place while installing the UltraGuard

12V Monitor.

CAUTION: The high voltage furnace wiring must NEVER be allowed to be to the left of the barrier. Never remove

the barrier or allow the low voltage wiring to be to the right of the barrier. This barrier is essential to the safe operation

of the UltraGuard 12V.

LOW VOLTAGE FURNACE CONTROL

In lieu of shutting off the furnace by means of the high voltage emergency switch, the UltraGuard Monitor can shut off the

furnace by interrupting the secondary of the low voltage transformer, which

controls the furnace. The advantage of low voltage control is that a security

installer can complete the UltraGuard installation instead of an electrical

contractor.

The following procedure may only be employed when the furnace provides

domestic hot water or domestic hot water is supplied by an electric hot water

heater. Do not use this method of control if a separate gas or oil fired hot

water heater is employed.

Connect the UltraGuard 12V to the furnaces low voltage transformer, as shown

in Figure 20.

Step 1. Shut the power off to the furnace and confirm with a meter that the

power has been disconnected.

Step 2. Remove one wire of the low voltage control that goes to the furnace

control box from the low voltage transformer, as shown in Figure 19. Run a

low voltage two-conductor wire pair from the UltraGuard 12V location to

the low voltage transformer location.

Step 3. At the furnace end, connect one of the low voltage wires to the "open"

terminal on the low voltage transformer and connect the other wire of the

low voltage wire to the disconnected furnace control wire (Figure 20). On

the UltraGuard 12V side, connect each of the black wires from the UltraGuard

12V to each of the low voltage wires.

Step 5. Turn on the furnace power.

Step 6. Test that the furnace properly shuts off when the UltraGuard 12V is activated (Press the Test Button on one of the CO

Detectors).

NOTE: The UltraGuard 12V must be powered for the furnace to operate.

Figure 19. Furnace wiring

Figure 20. Low voltage furnace wiring

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SEKURE ITI UltraGard Manual de usuario Pagina 20

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