61
HELIX™ Manual
(P/N 26291)
Chapter 4: System Installation
Rev A (February 2018)
HELIX™ PCU
Fire Suppression System
Surface Mounting (P/N 24290)
For surface mount applications, the Manual Pull Station contains a red cover cup which conceals the
included electrical outlet/conduit box and all wiring. The electrical outlet/conduit box contains 1/2”
and 3/4” knockouts for wiring and EMT conduit. If multiple Manual Pull Stations are used and
connected in series, the box must be oriented so that a 3/4” knockout is located on top. If only one
Manual Pull Station is used, the box may be oriented so that either a 1/2” or 3/4” knockout is located
on top, depending on preference. Install per the following instructions (See Figure 4.7.8a):
1.
Use the box as a template to match drill two holes in the selected mounting surface with a stud
or solid structure.
2.
Assemble the electrical box to the mounting surface and stud using appropriate hardware.
3.
The Manual Pull Station is attached to the electrical box using the (2) provided #8 screws.
Install the provided plastic plugs (2) in the remaining two holes on the cover.
Do NOT connect
any cables or field wiring until directed to do so in Section 4.9.
MOUNTING SURFACE
3/4” CONDUIT FITTING (INCLUDED)
(1/2” FITTING OPTIONAL)
3/4” EMT CONDUIT
(1/2” EMT CONDUIT OPTIONAL FOR
SINGLE PULL STATIONS ONLY)
BOX INSTALLATION FASTENERS (2)
(INSTALLER SUPPLIED)
Figure 4.7.8a
STUD OR SUPPORT
#8 CAP SCREWS (2)
(INCLUDED)
PLASTIC PLUGS (2)
(INCLUDED)
3/4” KNOCKOUT
(1/2” KNOCKOUT
OPTIONAL)
ELECTRICAL BOX
(INCLUDED)
FULLY INSTALLED SURFACE MOUNTED PULL STATION
(ALL WIRING/CONDUIT INWARD OF MOUNTING SURFACE)