User Manual
General Information
6
2.1 Dimensions and Layout
Operating Parameters D4/D4-V
No-tools maintenance Yes
Special lamp plug Yes
Lamp operation indicator Yes
Controller operation indicator Yes
Reference card Yes
Lamp timer display Yes
Lamp timer reset button Yes
Mute button Yes
Figure 3 System - Dimension and Layouts
Item Description Function
1 Sample valve Allows for sampling of raw water.
2 Shut-off valve Required to allow maintenance of pre-treatment equipment.
3 Pre-treatment
Refer to Section 1.3.
Note: A 5 micron (nominal) sediment filter must be installed before the UV system and after any water 
softening equipment.
4 Bypass shut-off valve
Bypass line and valve are optional. Intended to provide emergency water supply in the event that the 
UV system is unavailable.
5 Shut-off valve Required to allow maintenance of UV system.
6 Sample valve
Allows for sampling of water entering UV chamber; necessary in order to confirm water being treated 
is of adequate quality.
7 UV chamber Provides disinfection of the water. 
8 CoolTouch
™
 valve Drains water from the chamber that’s been warmed by the lamp during periods of no flow.
Clearance for 
lamp removal
To Drain
48” 
(
122cm
)
OUTLET
A B
C
L
D
6
1 2
3
5
4
11
10
14
Ø
13
8
9
L
12
6
7
1 2
3
5
4
Ø
INLET










