Hydrolevel 24 Series - Manual

WARNING: To prevent
electrical shock or equip-
ment damage, power must
be off during installation or servicing
of the control. To prevent serious
burns, the boiler should be thorough-
ly cooled before installing or servic-
ing control. Only qualified personnel
may install or service the control in
accordance with local codes and
ordinances. Read instructions com-
pletely before proceeding.
HOT WATER BOILERS: Probe must be
installed at or above the minimum safe
water level established by the boiler
manufacturer. The probe may be
installed directly in the boiler if a suit-
able tapping is available (A), in the riser
(B), or in the header (C) or (D).
IMPORTANT: To assure proper
drainage, pipe diameter should be no
less than 1" on installations in vertical
piping and no less that 1
1 ⁄
4
" on installa-
tions in horizontal piping.
Loosen the two control box cover bind-
ing head screws and remove the cover. Slide keyhole slots over probe mounting
screws and tighten screws (with either a
1/4" hex head driver or flat screwdriver). Connect the ring terminal wire lead to the probe terminal
stud and secure with the lock washer and wing nut provided.
With the power removed, proceed with installation and
wiring according to Method A or B described on next page.
24 Series
Low Water Cut-Off
24 VAC Operating Voltage
Heavy-duty electro-mechanical design for long life.
Automatically shuts off burner in a low water condition to
prevent boiler damage.
Low maintenance. No moving parts to wear stick or hang up,
as in float devices.
Rugged construction. Designed for the heating professional.
1. Where To Install
4. Control Mounting
MINIMUM
WATER LEVEL
HOT WATER
BOILER
A
B C
D HOT WATER BOILER
INSTALLATIONS
TEE MOUNTING: If a field fabricated tee is used, make sure that the tee drains thoroughly when the
water level falls below it, and that it conforms to the spacing requirements described in Step 3.
Models equipped with the shorter EL1214-SV probe can be installed in most standard reducing tees.
Safgard cast iron tees are also available to accommodate all probe models (See page 4).
2. Tee Options 3. Probe Installation
STANDARD
REDUCING TEE
(SV Models Only)
FOEM-TEE
(160psi)
1214C-2 TEE
(250psi)
FABRICATED TEE
Check to insure 1/4" clearance from probe to
any surface within the boiler or tee. When
installed in a tee, the probe tip should extend
fully into the pipe run. Apply pipe sealing com-
pound to threads.
Note: Use of Teflon tape is not recommended.