Aprilaire 1910, 1930 User Manual

MODELS 1910 & 1930

Ultraviolet Germicidal Lamps

Owner’s Manual

II. PRINCIPLE OF OPERATION

I. INTRODUCTION

WARNING

Ultraviolet light is harmful to eyes and skin.

Never look at light produced by this lamp.
Unplug lamp before servicing.

Electrical shock from 120 VAC may cause
serious injury. Disconnect power before

servicing and keep disconnected until
complete. The lamp has a grounding-type (3
prong) plug that will fit only into a grounding­type power outlet. Do not alter plug in any way.

Lamp may cause personal injury in the form of
burns or cuts. Wear protective gloves and

safety glasses when handling lamp. To prevent
burns, unplug lamp and allow to cool for several
minutes before servicing. If lamp is broken,
refer to lamp disposal section of this manual.

© Research Products Corp.

Thank you for your purchase of an Aprilaire Ultraviolet
Germicidal Lamp. We sincerely appreciate your business and
are pleased to add your name to the growing list of satisfied
customers who have invested in better indoor air quality.
Research Products Corporation is the largest manufacturer of
a complete line of indoor air quality products such as Aprilaire
humidifiers, air cleaners, thermostats, zone control systems,
carbon monoxide alarms and energy recovery ventilators. To
learn more about the ultimate in comfort and indoor air quality
for your home, please visit our website, www

.aprilair

e.com.

Please take a few minutes to read this owners manual to
understand the operation of your Aprilaire UV Germicidal
Lamp and the annual required maintenance. This booklet will
also familiarize you with the benefits this product offers. Be
sure to register your warranty with us for our records and
your protection. This can be accomplished by filling out the
warranty card included with the product or by registering on
line at, www

.aprilaire.com/war

ranty.

The air conditioning or heat pump coil that is part of your heating, ventilating, and air conditioning (HVAC) system is designed
to cool the air passing through it, thus generating comfortable air for your home. During this process, dehumidification also
occurs as water condenses from the air stream onto the cooling coil. This water, referred to as condensate, drains away from
the air conditioning coil into the drain pan and through the drain connection on the side of your furnace/air handler. In some
cases, extended operation of an air conditioning system and the associated moisture on the air conditioning coil can support
the growth of mold and bacteria. The technology incorporated in your Aprilaire UV Germicidal Lamp uses UVC spectrum light
to kill mold and bacteria growing on the coil. This technology has been used for over 60 years to kill microorganisms. Your
lamp will help reduce the risk of allergic reactions and illnesses caused by biological growth on the air conditioning or heat
pump coil, and will eliminate the foul odors associated with such growth on the coil. It’s an excellent addition to any indoor air
quality system! In addition, it will protect your air conditioning system from reduced efficiency caused by biological growth on
the air conditioning coil. By eliminating this growth, your air conditioner will run at peak performance and use less energy.

3

III. HOW TO CHECK LAMP OPERATION

After your lamp has been installed by a qualified HVAC
Contractor, you may check its operation using the following
procedure. These instructions apply to Model 1910 and both
units that make up Model 1930. Read all WARNING
statements at the beginning of this manual. Failure to do so
could lead to personal injury and/or equipment damage.

1. Plug the lamp’s POWER CORD into a standard 120 VAC
outlet that is always energized.

2. Turn the lamp’s ON/OFF SWITCH to the ‘On’ position.

3. Look at the SIGHT GLASS located in the bottom center of
the UNIT HOUSING. See Figure 1. If the lamp is operating
correctly, the SIGHT GLASS will be illuminated by blue light.
If not, see the ‘Troubleshooting’ section for additional steps.

4. If any stray UV light can be seen, contact the HVAC
Contractor who installed the lamp to correct.

IV. ANNUAL LAMP REPLACEMENT

Your Aprilaire Ultraviolet Germicidal Lamp is designed for the lamp to be on at all times. After 9,000 hours of operation – 1 year
of constant use – the effectiveness of the lamp inside the unit diminishes and needs to be replaced. Rarely will a lamp burn
out in one year of continuous use; replacement is necessary because the lamp’s intensity decreases. Installation of the
replacement lamp (Aprilaire Service Part #90) is best handled by a qualified HVAC Service Contractor.

The steps for replacing the Lamp are the following (see Figures 1 - 3):

a. Switch ON/OFF SWITCH to ‘Off’ and unplug POWER

CORD. Wait several minutes for lamp to cool.

b. Loosen NUTS that secure UNIT HOUSING to BASE.

Remove UNIT HOUSING.

c. Loosen LAMP DOOR SCREW that secures LAMP DOOR to

BASE.

d. Carefully pull LAMP ASSEMBLY out of duct. This requires

that you slightly lift up and tilt forward the LAMP
ASSEMBLY while pulling out from the BASE.

e. Remove LAMP by pulling it out from LAMP SOCKET and

out from LAMP HOLDER.

f. Install new, replacement LAMP (Aprilaire Service Part #90)

into LAMP SOCKET and LAMP HOLDER. Be sure LAMP is
fully inserted into LAMP SOCKET.

g. Use alcohol to remove any dirt and/or fingerprints from

the new LAMP.

h. Return LAMP ASSEMBLY to BASE and fasten LAMP

DOOR SCREW.

i. Put UNIT HOUSING back in place and fasten NUTS. Be

sure UNIT HOUSING rests completely on the BASE and
that all wiring is fully inside.

j. Plug in POWER CORD and turn ON/OFF SWITCH to ‘On.’ If

the lamp is operating correctly, the SIGHT GLASS will be
illuminated by blue light.

k. In the table provided on page 7, record the date LAMP

was replaced.

Under normal conditions, your Aprilaire Ultraviolet Germicidal Lamp should not require any maintenance other than annual
lamp replacement.