Honeywell Home Safety Product R4795A 用户手册

60-2285—7

R4795A

CHECKOUT

Checkout

Fig. 10—Internal view showing amplifier and
test jack for flame current test.

CAUTION

Use extreme care while testing the R4795; line
voltage can be present on most terminals when the
power is On.

CHECKOUT SUMMARY

The following list summarizes the checkout tests re-

quired for each type of installation. Instructions for each test
are included in this section.

Preliminary Inspection: All installations.
Flame Current Check: All installations.
Pilot Turndown Test: If a pilot must be proved before the

main fuel valves can open.

Hot Refractory Hold-in Test: Photocell oil installations

only.

Ignition Spark Response Test: All ultraviolet detector

applications.

Safe Shutdown Tests: All installations.
Refer to Fig. 2 to 3 for terminal location, and to Fig. 9 and

10 for location of component parts. Loosen thumbscrew to
remove cover.

Fig. 9—Internal components of R4795A.

M8679

1K
UNDER
COVER

PLUG-IN
PURGE
TIMER
(ST71A)

SPRING
CLIP FOR
AMPLIFER

PLUG IN AMPLIFIER

(R7289–GREEN–RECTIFICATION)
(R7290–PURPLE–ULTRAVIOLET)

TRANSFORMER

SAFETY
SWITCH
RESET
BUTTON

CAPTIVE
MOUNTING
SCREWS
(10)

M8680

ST71A
PLUG-IN
PURGE
TIMER

PURGE TIMER
CONNECTORS

PLUG-IN
AMPLIFIER

OPTIONAL
ALARM TERMINALS

AMPLIFIER
CONNECTORS

TEST JACK

ARC-GAP IGNITION INTERFERENCE
PROTECTION (R7289 RECTIFICATION
AMPLIFIER ONLY)

PRELIMINARY INSPECTION

Make certain that:
1. Wiring connections are correct and all terminal screws

are tight. Use a meter to check the continuity of all circuits.

2. Flame detector is installed and positioned properly.

Consult the appropriate installation instructions.

3. Ambient temperature at flame detector does not ex-

ceed maximum rated temperature.

4. Correct combination of amplifier and flame detector is

used. Refer to Plug-In Flame Signal Amplifiers in Specifica-
tions section.

5. Burner is completely installed and ready to fire; fuel

lines are purged of air.

6. Combustion chamber and flues are clear of fuel.
7. Power is connected to system disconnect switch (mas-

ter switch).

8. Safety switch is reset; push in and then release the

green safety switch.

9. All limits and interlocks are reset.

IMPORTANT: Anytime you reset the safety switch, wait at

least one minute after it trips to allow the heater to cool
before pushing in the reset button.

CAUTION

Make initial pilot lightoff with manual main fuel
shutoff cock closed.