5
IOM - THRC
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Operation
Initial Start-Up
1.
Connect the power cord to a standard 115-Volt, Single Phase, 60 Hertz, or 220-Volt, 50/60 Hertz, grounded power source.
Verify that the circuit is sized to provide sufficient amperage as noted on the
THRC
data plate.
2.
Locate the “ON/OFF” switch on the right side of the unit. The switch is a maintain contact rocker type.
3.
Turn the
THRC
unit on by pressing downward on the raised portion of the rocker switch. A light whirring
sound will be
heard as the motor starts. Within 5 to 10 seconds, the module will start to provide clean air into the environment.
Speed Adjustment
Note:
THRC
HF
unit
s
are
set on high speed at the factory.
TLRC LF units are set to OFF.
1.
To change speeds, remove the
supply
grille by pulling down and lifting out.
2.
Turn the 3-speed switch (or solid state speed control) to the desired setting on the
THRC
HF
or
L
F
.
3.
Replace the
supply
grille when finished.
Filter Change Indicator
1.
Locate the airflow indicator on the right side of the unit above the “ON/OFF” switch. On high speed, the light will turn on
when there is insufficient pressure, indicating the need for a filter change. It is recommended to change prefilter. If the
filter change indicator light is still illuminated, it is recommended to replace the HEPA filter. The airflow indicator should
not be used as the only guide for when a filter change is necessary. The unit should be checked at each use to ensure
recommended room air changes per hour are being met.
2.
The filter change indicator light can be adjusted by adjusting the pressure switch which can be seen on the
b
ack panel of
the
THRC
. For setting the light, block the lower intake grill approximately 75% while the unit is on high speed. The
pressure switch should be set to have the light flicker while covered 75%. Once the restriction is removed, the light should
go off. If the intake grille is completely covered, the light should be solid on.
3.
The air velocity generated by the unit may be checked using an airflow measurement device.
For the THRC HF t
he
volume of air entering
the lower intake grille should be approximately 560 CFM (951 m
3
/h) on low, 690 CFM (1172
m
3
/h) on medium, and
800 CFM (1359 m
3
/h) on high with a new filter. Air volume on the
THRC
LF
should be
approximately 70 CFM (118 m
3
/h) to 370 CFM (628 m
3
/h) depending on the position of the speed control with a new filter.
Recirculation Mode
1.
The
THRC
unit is set at the factory on the 100% air recirculation mode.
2.
The room air change rate of the unit will depend on both the
THRC
speed setting and the size of the room.
3.
For maximum recirculation efficiency
in a patient room
, the unit should be placed between the entry door and the patient’s
bed or the activity
area (see Figure 1 below). However, the unit will function effectively at other locations within the room.
