Model FF-2500 Proportioning Unit
32
25942-1, Issue 4
WARNING:
T
HE TERMINAL JUMPER MUST NEVER BE USED ON THE PRIMARY HEATER
S
OLID
S
TATE
R
ELAY
(SSR). T
HIS WILL RESULT IN COMPLETE LOSS OF CONTROL AND CAUSE DAMAGE
TO THE EQUIPMENT OR SERIOUS BODILY INJURY
.
c)
Install the terminal jumper strip across terminals #1 and #2 on the Hose Heater
SSR.
d)
Manual Hose Heat control requires the installation of a Hose Thermometer.
Insert the thermometer through the sponge so that the stem follows the twist of
the hoses and lies between the butyl inner hose and the outer sponge insulation.
This gives the most accurate temperature indication. The thermometer should
be located on the end of the hose nearest the gun in a position where the
operator can see it while spraying.
e)
Maintaining hose temperature
now requires manual adjustment
of the Hose Heat Power Set.
Adjust the control clockwise to a
maximum of 50 Amps for initial
warm up and then adjust as
required to maintain the hose
temperature.
f)
Restore electrical power, switch
ON the main switch and hose
heat circuit breaker and monitor
the thermometer for proper spray
temperature.
Figure 17. Terminal Jumper Strip
Installation
WARNING: D
O NOT ALLOW HOSE TO OVERHEAT DURING MANUAL CONTROL OF THE HOSE
HEAT SYSTEM
. H
OSE TEMPERATURE
,
AS INDICATED BY A PROPERLY INSTALLED HOSE
THERMOMETER
,
MUST NOT EXCEED
170
°
F (76
°
C).
C
LOSELY MONITOR HOSE TEMPERATURE
TO AVOID PERSONAL INJURY AND
/
OR DAMAGE TO PROPERTY
.
6. TEMPERATURE SENSING UNIT (TSU)- Two conditions must be satisfied for
proper operation:
•
The sensor must be functional.
•
The signal must travel uninterrupted from the sensor to the control unit.
Unplug the TSU from its extension. Without undoing any chemical connections,
move the hose section with the TSU to the proportioning unit, plug the TSU directly
into the TSU extension harness, restore electrical power and energize the hose heat
circuit. If control is not restored, change the TSU. If control is restored,
systematically check each section of the TSU wire harness out to the gun.
7. PRIMARY HEAT AND HOSE HEAT TEMPERATURE SETTINGS- The purpose
of the hose heater is not to add heat but rather to maintain the temperature developed
by the primary heater. If indications are that the hose heater is not maintaining
temperature during flow, check that the primary heater and hose are set for the same
temperature or reduce the output.
8. LOW LINE VOLTAGE- The hose heat system operates at 220 Volts. Low line
voltage will significantly reduce power available and the heater will not perform to
