20
ATI SP 80, 120, 220, 300, 400 – INSTALLATION INSTRUCTIONS
Sept - 01
2.5a WATER CONNECTIONS
ATI 80 - 120
A : Cold water inlet, install in the following order:
1. Stopcock (recommended)
2. Inline strainer to remove any impurities as :
sand, gravel, mud (optional)
3. softener or purifier, for very hard water
(recommended).
4. Secondary return (where required).
5. drain cock .(recommended)
B : Hot water outlet, connect the outlet to the
hot water services.
ILLUSTRATION 16a
ATI 220 - 300 - 400
A : cold water inlet, install in the following order:
1. Stopcock (recommended).
2. Inline strainer to remove any impurities as :
sand, gravel, mud (optional).
3. Softener or purifier, for very hard water
(recommended).
B : Hot water outlet, connect the outlet to the
hot water services.
C : Common secondary return and drain connection.
4. Secondary return pump
The secondary return circuit is obligatory.
5. Drain cock.
6. Open vent.
ILLUSTRATION 16b
MODEL :
ATI SP
80
120
220
300
400
COLD WATER
INLET
3/4"
3/4"
1"1/4 1"1/4 1"1/4
RETURN
- - -
- - -
1"
1"
1"
DRAIN
- - -
- - -
1"
1"
1"
HOT WATER
OUTLET
3/4"
3/4"
1"1/4 1"1/4 1"1/4
WATER CONNECTION AND SIZES
WARNING :
There is a open ½” connection (ATI
SP 80 & 120) or 1 ½” connection (ATI SP 220, 300 &
400) located in the side of the unit for the
temperature & pressure relief valve for use with an
Unvented system.
If the unit is fitted to an open system this
connection is to be plugged.
