13
THERAFLO REPLACEMENT PARTS DIAGRAM
THERAFLO REPLACEMENT PARTS TABLE
REF NO.
PART NO.
DESCRIPTION
1 & 2
THERAF4320
Hand Knob Kit for Strainer Cover (inc Hand Knob &
Swivel Nut)
3
THERAF4304
Strainer Cover, Hand Knob Style - Clear
4
THERAF4303
Strainer Cover O-Ring
5
THERAF4302
Basket
6
THERAF4301B
Pump Housing/Strainer - 50mm, w/Drain Plugs, threaded
external
7 & 8
THERAF4318
Drain Plug with O-Ring
9
THERAF4317
Mounting Foot Cap Screw (set of 2)
10
THERAF4316B
Mounting Bracket, hps style
11
THERAF4323
Spacer for motor support (required only for 1hp model)
12, 13, 14
THERAF4321
Union Kit (set of 2) suit 40mm & 50mm w/Gasket (T-Seal)
15
THERAF4322
Union Gasket (T-Seal)
16
THERAF4305
Housing Gasket
17
THERAF4323B
Diffuser Gasket
18
THERAF4306C
Diffuser
19
THERAF4307B
Impeller Ring
20
THERAF4308K
Impeller 1HPVS (required only for 1hp model)
21
THERAF4309B
Seal Assembly (inc, Mechanical Seal and Slinger)
22
THERAF4312B
Slinger
23
THERAF4310B
Seal Plate
24
THERAF4311B
Motor Cap Screw (4 required)
25
THERAF4313B
Motor Mounting Plate
26
THERAF4315K
Motor 1HPVS (required only for 1hp model)
27
THERAF4314
Housing Cap Screw (6 required)
THERAF4308H
Impeller 1.5HPVS (required only for 1.5hp model)
THERAF4315L
Motor 1.5HPVS (required only for 1.5hp model)
THERAFLO REPLACEMENT PARTS DIAGRAM
THERAFLO REPLACEMENT PARTS TABLE
REF NO.
PART NO.
DESCRIPTION
1 & 2
THERAF4320
Hand Knob Kit for Strainer Cover (inc Hand Knob &
Swivel Nut)
3
THERAF4304
Strainer Cover, Hand Knob Style - Clear
4
THERAF4303
Strainer Cover O-Ring
5
THERAF4302
Basket
6
THERAF4301B
Pump Housing/Strainer - 50mm, w/Drain Plugs, threaded
external
7 & 8
THERAF4318
Drain Plug with O-Ring
9
THERAF4317
Mounting Foot Cap Screw (set of 2)
10
THERAF4316B
Mounting Bracket, hps style
11
THERAF4323
Spacer for motor support (required only for 1hp model)
12, 13, 14
THERAF4321
Union Kit (set of 2) suit 40mm & 50mm w/Gasket (T-Seal)
15
THERAF4322
Union Gasket (T-Seal)
16
THERAF4305
Housing Gasket
17
THERAF4323B
Diffuser Gasket
18
THERAF4306C
Diffuser
19
THERAF4307B
Impeller Ring
20
THERAF4308K
Impeller 1HPVS (required only for 1hp model)
21
THERAF4309B
Seal Assembly (inc, Mechanical Seal and Slinger)
22
THERAF4312B
Slinger
23
THERAF4310B
Seal Plate
24
THERAF4311B
Motor Cap Screw (4 required)
25
THERAF4313B
Motor Mounting Plate
26
THERAF4315K
Motor 1HPVS (required only for 1hp model)
27
THERAF4314
Housing Cap Screw (6 required)
THERAF4308H
Impeller 1.5HPVS (required only for 1.5hp model)
THERAF4315L
Motor 1.5HPVS (required only for 1.5hp model)
IMPORTANT - Clean all recesses and parts to be reassembled.
Inspect gaskets and replace if necessary.
SHAFT SEAL REPLACEMENT
IMPORTANT SAFETY INSTRUCTIONS – PLEASE READ AND FOLLOW ALL
INSTRUCTIONS
When servicing electrical equipment, basic safety precautions should always be
observed including the following. Failure to follow the instructions may result in
injury.
»
Disconnect the pump motor power cord from the power outlet before
beginning the shaft seal replacement.
»
Only qualified personnel should attempt to replace the shaft seal. Contact your
local Authorised Theralux Service Centre if you have any questions.
»
Exercise extreme care in handling both the rotating and stationary sections of
the two-part replacement seal. Foreign matter or improper handling will easily
scratch the graphite and ceramic sealing surfaces.
»
See the “Parts Diagram” on page 15 for the pump component locations.
Removing the Motor Assembly
1. Remove the six (6) housing cap screws (item 27), which hold the motor
assembly to the pump housing/strainer (item 6), using a 9/16” AF spanner or
socket.
2. Slide the motor assembly out of the pump housing/strainer (item 6), exposing
the diffuser (item 18). Pull the diffuser off of the seal plate (item 23), exposing the
impeller (item 20). The diffuser may remain in the pump housing/strainer. To
remove, pull it straight out of the pump housing/strainer.
Removing the Impeller
1. To prevent the motor shaft from turning:
For 1hp:
Insert a flat head screw driver through the centre hole in the fan cowling,
into the socket on the end of the motor shaft and hold it.
For 1.5hp: Insert a 3mm allen key into the slot at the bottom of the motor and
hold it.
2. Remove the impeller (item 20) by rotating it counter-clockwise. The spring
portion of the seal assembly is now exposed. Carefully note the position of the
spring seal, and remove it. Also remove the impeller ring (item 19) from the
impeller and note the way that it was installed.
Removing the Ceramic Seat
1. Remove the seal plate (item 23) from the motor mounting plate (item 25).
2. Press the ceramic seat with rubber cup out of the seal plate (item 23). If tight,
use a small screwdriver to tap the seal out from the back side of the seal plate.
SEAL, IMPELLER AND DIFFUSER
INSTALLATION
1. Clean and lightly lubricate the motor shaft and seal recess in the seal plate
(item 23) with dilute solution of non-granulated liquid type soap. Gently wipe the
polished face of the ceramic seal with a soft, lint free cotton cloth. Lubricate the
rubber cup on the ceramic seal and press it firmly into the recess of the seal plate
(item 23) with the polished ceramic surface facing towards you. Ensure the
motor shaft slinger (item 22) is slid just onto the start of the shaft with the
tapered end pointing outward or away from the motor.
2. Place the seal plate (item 23) onto the motor mounting plate (item 25). Align
the tabs on the seal plate with the grooves on the motor mounting plate. The
outside profile of the two parts should be the same.
3. Gently wipe the black, polished surface of the carbon spring seal assembly
(item 21) with a soft, lint free cotton cloth.
4. Clean and lubricate the impeller (item 20) and press the carbon spring seal
assembly (item 21) onto the impeller hub with the black, polished surface facing
away from the impeller.
5. Screw the impeller (item 20) onto the motor shaft in a clockwise direction and
tighten snugly by holding the motor shaft with a flat head screw driver (for 1hp
model) or 3mm allen key (for 1.5hp model) as explained earlier. Place the impeller
ring (item 19) back onto the impeller (item 20), with its flange facing towards the
diffuser (item 18).
6. Place the diffuser (item 18) over the impeller (item 20) and onto the seal plate
(item 23), aligning the arrow to the top of the motor or the top ridge of the seal
plate. Give it a tap with the heel of your hand to make it seat into position on the
seal plate. Ensure the diffuser gasket is fitted to the outside of the diffuser inlet.
7. Replace the motor assembly into the pump/strainer housing in the reverse
order of the removal steps. Ensure the housing gasket (item 16) is lubricated and
tighten the housing cap screws (item 27) in a cross pattern and evenly.
NB: Do not use petroleum-based lubricants on gaskets, O-rings or plastic
components. Use only silicone-based lubricants.
