HoneywellメーカーR4795Aの使用説明書/サービス説明書
ページ先へ移動 of 16
1 60-2285—7 R4795A Flame Safeguard Primary Contr ols The R4795A Protectorelay™ Primary Control provides solid state electronic flame safeguard protection for commercial and industrial gas or oil burn ers. It provides a prepurge period before each start, and intermittent pilot.
60-2285—7 2 R4795A SPECIFICATIONS • ORDERING INFORMATION Specif ications R4795A Flame Safeguard Primary Control recycles once after flame failure to try to re-establish pilot before lockout.
3 60-2285—7 R4795A SPECIFICATIONS TERMINAL RATINGS: Terminal Load Rating 3 Pilot Valve 125 VA pilot duty. Intermittent Ignition a 360 VA. 4 Interrupted Ignition 360 VA. 5 Main Fuel Valve(s) 125 VA pilot duty, or 25 VA pilot duty plus one or more motorized valves with total rating up to 400 VA opening, 200 VA holding.
60-2285—7 4 R4795A INSTALLATION Installation Vibration Do not install the R4795A where it could be subject to excessive vibration. Vibration shortens the life of the elec- tronic and mechanical components. Weather The R4795A is not designed to be weathertight.
5 60-2285—7 R4795A INSTALLATION IMPORTANT: Do not run high voltage ignition trans- former wires in the same conduit with the flame detector wiring. 5. For ignition installations in a contaminating environ- ment, use Honeywell Specification no. R1239001 High Ten- sion Ignition Cable or equivalent.
60-2285—7 6 R4795A INSTALLATION Replacing RA890E,F,G with R4795A 1. Disconnect all wires from terminal 1, and splice with solderless connector. (If RA890 has no terminal 1 wiring, disregard this step.) 2. Remove line voltage controller wire from terminal 6 and connect to terminal 1.
7 60-2285—7 R4795A INSTALLATION Fig. 6—Flame detector wiring. M8686 BLUE WHITE F G C7027, C7035, OR C7044 ULTRAVIOLET FLAME DETECTOR BLUE YELLOW BLACK BLACK F G C7012 ULTRAVIOLET DETECTOR 1 G F X X X X X X FLAME ROD G F X X PHOTOCELL 1 C7027, C7035, AND C7044 FLAME DETECTOR LEADS ARE COLOR CODED BLUE AND WHITE.
60-2285—7 8 R4795A CHECKOUT Check out Fig. 10—Internal view showing amplifier and test jack for flame current test. CA UTION Use extreme care while testing the R4795; line voltage can be present on most terminals when the power is On. CHECKOUT SUMMARY The following list summarizes the checkout tests re- quired for each type of installation.
9 60-2285—7 R4795A CHECKOUT 2. The flame current is at least two microamperes for R7289A Rectification Amplifier (color-coded green), or at least 1.5 microamperes for an R7290A Ultraviolet Amplifier (color-coded violet).
60-2285—7 10 R4795A CHECKOUT CA UTION Do not manually push in the relays. 4. Check that the pilot is lit and relay 2K is pulled in. 5. Open the manual main burner shutoff cock. Main flame should light within one second. If the burner does not light within one second, close the shutoff cock and shut off power to the relay.
11 60-2285—7 R4795A OPERATION • TROUBLESHOOTING Operation NORMAL OPERATION (REFER TO FIG. 2 AND 3.) Call for Heat (Limit Switch Closed) Terminal 1 energized. Relay 3K pulls in to close contact 3K2 and energize terminal 8 fan or burner motor. Airflow Proved Low voltage airflow switch between terminals 6 and 7 closes to energize the purge timer.
60-2285—7 12 R4795A TROUBLESHOOTING F. Pilot lights and relay 2K pulls in but the main burner does not light. G. Relay 2K remains in after flame is extinguished. H. Miscellaneous problems: 1. Repeated lockouts or control failures. 2. Ignition interference (flame rod installations only).
13 60-2285—7 R4795A TROUBLESHOOTING • SERVICE (3) Remove any flame simulating condition such as false light. (4) Note that any change made in the detector or its sighting requires a pilot turndown test. 3. If using an R7290 Ultraviolet Amplifier, replace the amplifier and recheck the flame relay dropout time.
60-2285—7 14 R4795A SERVICE IMPORTANT: 1. Do not clean contacts unless absolutely necessary. 2. Use only Honeywell Contact Cleaner part no. 132569. Do not use any other type of contact cleaner. 3. Use extreme care to avoid bending the contacts or changing the specifications or configuration in any way.
15 60-2285—7.
Home and Building Control Home and Building Control Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 Printed in United States www.
デバイスHoneywell R4795Aの購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Honeywell R4795Aをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはHoneywell R4795Aの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Honeywell R4795Aの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Honeywell R4795Aで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Honeywell R4795Aを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はHoneywell R4795Aの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Honeywell R4795Aに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちHoneywell R4795Aデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。