L.B. White FUEL HD120 Owner's Manual page 12

B. Single S S tage T T hermostat
1. Operate on first stage heat only.
-- Remove jumper at terminals 8 and 9.
-- Connect thermostat to terminals 8 and 9.
8
9 10
WHITE
BLACK
2. Operate on second stage heat only.
-- Remove jumper at terminals 8 and 9.
-- Move jumper to terminals 9 and 10.
-- Connect thermostat to terminals 8 and 9.
8 9
10
JUMPER
WHITE
BLACK
C. Building C C ontroller C C onnections - H H eating
(Using N N on-P P ower C C ontacts)
1. Operate on first stage heat only.
-- Remove jumper at terminals 8 and 9.
-- Connect controller contacts in terminals 8 and 9.
8
9 10
RETURN
FROM CONTROLLER
TO CONTROLLER
11
THERMOSTAT
WHITE
BLACK
THERMOSTAT
WHITE
BLACK
FIRST STAGE HEAT CONTACT
2. Operate on second stage heat only.
-- Remove jumper at terminals 8 and 9.
-- Move jumper to terminals 9 and 10.
-- Connect controller contacts at terminals 8 and 9.
8 9
10
TO CONTROLLER
3. Operate both stages of heat.
-- Remove jumper at terminals 8 and 9.
-- Connect controller contacts at terminals 8 and 9
(first stage heat).
-- Connect controller contacts at terminals 9 and 10
(second stage heat).
-- Supply an electrical connection (jumper) between
relays in building control to allow staging transition of
gas control valve.
8 9
10
RETURN
FROM CONTROLLER
RETURN
FROM CONTROLLER
TO CONTROLLER
D. Heat-V V ent B B uilding C C ontrol C C onnections
(Using N N on-P P owered C C ontacts)
-- Remove jumper at terminals 1 and 2.
HEAT MODE
-- Remove single black lead at terminal 3 to selector
switch.
-- Add contacts at terminals 1 and 3.
BLACK
WHITE
GREEN
POWER CORD
TERMINAL
STRIP
RETURN
FROM CONTROLLER
FIRST STAGE HEAT CONTACT
SECOND STAGE HEAT CONTACT
FIRST STAGE HEAT CONTACT
HEAT MODE
CONTACTS
WHITE
HEAT
BLACK WHITE
WHITE
BLACK
VENT
SELECTOR SWITCH
JUMPER
4
3 5
1 2 6 7